Analog Devices Inc. DC1760A

Overview

DC1760A from Analog Devices (formerly Linear Technology) is a demonstration circuit implementing a high-speed clock divider and sine-to-CMOS level converter for ADC clocking. It accepts a 50 Ω AC-coupled sine wave input (5–13 dBm, 3.3 Vpp), divides frequency by 2, and outputs a low-jitter CMOS clock signal suitable for driving high-speed analog-to-digital converters.

For engineers reviewing the DC1760A datasheet, DC1760A pinout, DC1760A application, or DC1760A equivalent, this board provides validated reference design for jitter-sensitive clock distribution in data acquisition systems, FPGA-based timing chains, and precision sampling applications requiring retimed CMOS clock edges.

Technical Context

The DC1760A implements a two-stage signal path: first, an RF attenuator and clock divider IC (LTC6957-2 or equivalent) reduces input frequency by factor of 2; second, a D flip-flop retiming stage-clocked by the original input sine wave-reshapes the divided output into a clean, edge-aligned CMOS waveform with minimized deterministic jitter.

This architecture ensures sub-100 fs added jitter performance and maintains phase coherence between input and output clocks, critical for time-interleaved ADCs and high-resolution spectral analysis systems where clock-induced aperture uncertainty must be tightly controlled.

Key Specifications

Availability

DC1760A is available at Aetrix Electronics and suitable for high-speed data acquisition, precision test instrumentation, and FPGA-based signal processing systems requiring stable component supply and proven clock conditioning reference designs.

Supply support for DC1760A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (including legacy Linear Technology products) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC1760A belongs to Linear Technology's Demonstration Circuit (DC) series, designed to provide application-validated, ready-to-use hardware for evaluating critical timing, power, and signal chain functions in demanding measurement and conversion systems.

FAQ

What is the primary function of the DC1760A demonstration circuit?

The DC1760A demonstration circuit functions as a clock divider and sine-to-CMOS level converter. It accepts a high-frequency sine wave input, divides its frequency by two, and outputs a low-jitter CMOS clock signal optimized for driving high-speed analog-to-digital converters. The DC1760A achieves this using a dedicated clock divider IC followed by a D flip-flop retiming stage referenced to the original input.

Does the DC1760A require an external power supply, and what are the voltage limits?

Yes, the DC1760A requires an external DC power supply. Its operating voltage range is strictly 3.3 V to 6.5 V. Exceeding 6.5 V may damage the onboard circuitry. The DC1760A does not include on-board regulation, so users must supply a clean, well-decoupled source within this range.

Can the DC1760A accept differential or LVDS input signals?

No, the DC1760A is designed exclusively for single-ended 50 Ω AC-coupled sine wave input via female SMA connector. It does not support differential, LVDS, or clipped-sine inputs. Input signal must be +5 to +13 dBm, 3.3 Vpp sine wave - other formats require external conditioning before connection to the DC1760A.

Is the DC1760A compatible with common high-speed ADC evaluation boards?

Yes, the DC1760A features a male SMA output connector that directly mates with the clock input SMA ports found on many Analog Devices and legacy Linear Technology ADC demo boards (e.g., LTC21xx, LTC22xx families). No additional adapters or level-shifting circuitry is needed when using the DC1760A as a clock source for those platforms.

Where can I obtain design files or schematics for the DC1760A?

Design files-including schematic, layout, and bill of materials-for the DC1760A are available directly from Analog Devices. Users should contact Analog Devices' technical support or visit the product page for DC1760A on analog.com to request access. These files are intended for reference and derivative design use under applicable license terms.